® Mill - Thread Inserts ACME Inserts for Internal threads Pitch Insert Size = A TPI 21 30 40 12 Int. 21 I 12 ACME 30 I 12 ACME 10 Int. 21 I 10 ACME 30 I 10 ACME 8 Int. 21 I 8 ACME 30 I 8 ACME 6 Int. 30 I 6 ACME 5 Int. 30 I 5 ACME 4 Int. * 30 I 4 ACME 40 I 4 ACME 3.5 Int. 40 I 3.5 ACME 3 Int. * ** 40 I 3 ACME Order example: 21 I 8 ACME MT7 * Inserts to be used only on Multi-Insert toolholders see page B02-5 ** One cutting edge API RD API RD thread inserts are one-sided and may be used for both External and Internal threading Pitch Insert Size = A TPI 21 30 40 10 21 - 10 API RD 30 - 10 API RD 8 30 - 8 API RD 40 - 8 API RD Order example: 30 - 8 API RD MT7 B01-10